Effect of plant population on yield of garden peas under different moisture regimes

Stoker, R.

doi:10.1080/03015521.1975.10425830

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…The overall yield increase from 1880 to 2680 kg/ha was an increase of 43%. This irrigation yield response is a little lower than that obtained in previous work with peas at Winchmore (Stoker 1973(Stoker , 1975. Fertiliser As a main effect, the application of K caused a small but consistent increase in yield giving rise to a response in the combined analysis that was significant at the 100/0 level (Table 4).…”

Section: Irrigationcontrasting

confidence: 42%

Responses of non-irrigated and irrigated garden peas to phosphorus and potassium on Lismore stony silt loam

Carter¹,

Stoker²

1988

New Zealand Journal of Experimental Agriculture

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In six experiments conducted over the six seasons from 1976/77 to 1981/82, the response of non-irrigated and irrigated 'Greenfeast' garden peas to phosphorus (P) and potassium (K) fertilisers was examined. All experiments were carried out on Lismore stony silt loam on sites with different histories. P fertiliser was applied as superphosphate (300 kg/ha) and K as potassium chloride (100 kg/ha). Both fertilisers were applied at drilling.Yield responses to K, P, and P + K fertiliser occurred. However, these responses were small, inconsistent, and generally uneconomic. This work shows garden peas can be grown satisfactorily and most economically without P and K fertilisers when they are part of a cropping rotation on Lismore soils that have medium to high P and K soil test values. Low soil test values are unlikely to occur on these soils with normal fertiliser applications in crop/pasture rotations.

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Section: Irrigationcontrasting

confidence: 42%

Responses of non-irrigated and irrigated garden peas to phosphorus and potassium on Lismore stony silt loam

Carter¹,

Stoker²

1988

New Zealand Journal of Experimental Agriculture

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“…Under dryland Canterbury conditions, populations <80 plants/m 2 produce significantly lower yield (Stoker 1975). One of the key factors in achieving this optimum population is the use of high quality seeds.…”

Section: Introductionmentioning

confidence: 99%

Influence of seed quality characters on field emergence of garden peas (Pisum sativumL.) under various sowing conditions

Castillo

Hampton

Coolbear

1993

New Zealand Journal of Crop and Horticultural Science

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The relationship between seed quality characters and field emergence of garden pea seed lots was evaluated in 1988 for 82 seed lots from six cultivars under unirrigated conditions, and in 1989 for 23 seed lots from three cultivars under both irrigated and unirrigated conditions on several sowing dates. This study constitutes the most extensive evaluation of the prediction of field emergence in garden peas yet conducted. The favourable 1988 sowing conditions allowed good field emergence. However, low rainfall in November 1989 (unirrigated sowings) and excessive water at the 30 October and 20 December 1989 (irrigated sowings), were associated with reductions in field emergence. The germination test was correlated with field emergence when conditions for sowing were favourable and when low germinating seed lots were included in the analysis. However, when low germinating seed lots (<85%) were excluded, the relationship between germination and field emergence was low and unreliable. Differences in field emergence between seed lots were a reflection of differences in vigour which were detected by the conductivity test. The conductivity test was correlated with field emergence 1 To whom correspondence is to be addressed. H92054 Received 29 July 1992; accepted 31 March 1993of garden pea seed lots under all but the most favourable sowing conditions. Hollow heart may also be an important component of seed lot performance, particularly under moisture stress. The results of this study raise serious questions about the general applicability of the expected field emergence (EFE) equation which attempts to incorporate all these factors (germination, conductivity, and hollow heart) into a single predictive equation allowing calculation of sowing rates to achieve target plant populations. The conventional equation was particularly weak under conditions giving poor establishment, producing severe over-estimates of actual emergence. Attempts to improve the general equation by multiple linear regression analysis were unsatisfactory because derived equations showed widely different constants between cultivars and for various sowing conditions, and in many instances significant relationships were not obtained.

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“…A reduction in flower and pod numbers per plant with increased density has been frequently reported in grain legumes (Meadley & Milbourn 1970;Stoker 1975;Dominguez & Hume 1978). The inverse Similarly, the number ofovule Initials per pod, which is an indication ofthe maximum reproductive potential of each pod (Anderson 1971), decreased as plant density increased, in both cultivars.…”

Section: Discussionmentioning

confidence: 93%

Development of reproductive structures in field peas (Pisum sativumL.) at different densities

Falloon

White

1980

New Zealand Journal of Agricultural Research

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Two field pea cultivars, Huka and Whero, were grown under dryland conditions in Canterbury, New Zealand, at 5 plant densities ranging from 25 to 163 plants/m-. Retention of flowers and pods and development of ovule initials were investigated. Flowers per plant, pods per plant, ovule initials per pod, peas per pod, and the area of photosynthetically active tissue per plant (plant area) were aß inversely related to plant density. Although Huka produced more flowers, pods, and ovule initials than Whero, Whero had the greater plant area and lost fewer of these structures. This may be related to Whero's ability to maintain a higher photosynthetic area per reproductive structure. During pod filling the topsoll moisture content was low but water was available at greater depths. Plant area and plant area index had a greater effect on the retention and development of reproductive structures, especially ovule initials, than did soll moisture. Further work is required into the role of other plant and environmental factors on the development offlowers, pods, and ovules. Losses ofreproductive structures could be reduced by a combination of plant breeding and improved agronomy.

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Effect of plant population on yield of garden peas under different moisture regimes

Cited by 6 publications

References 8 publications

Responses of non-irrigated and irrigated garden peas to phosphorus and potassium on Lismore stony silt loam

Responses of non-irrigated and irrigated garden peas to phosphorus and potassium on Lismore stony silt loam

Influence of seed quality characters on field emergence of garden peas (Pisum sativumL.) under various sowing conditions

Development of reproductive structures in field peas (Pisum sativumL.) at different densities

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