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A field investigation was conducted during the kharif season of 2014 to optimize N doses and planting densities for enhanced growth and yield performance of maize under rainfed conditions of Nagaland. Application of N @ 80 kg/ha resulted in higher N uptake and enhanced growth of maize ultimately expressing superior yield attributes and registering the highest grain and stover yields of 3518.5 and 6976.01 kg/ha respectively. Maintaining a planting density of 55,555 plants/ha at a spacing of 60 cm x 30 cm was found to provide optimum crop stand in maize resulting in higher N uptake and favourable growth consequently recording better yield attributes and maximum grain yield of 2941.66 kg/ha. However, higher planting density of 74,074 plants/ha at a spacing of 45 cm x 30 cm was found to be more effective for higher stover yields up to 6772.63 kg/ha.

The experiment was laid out in a randomized block design (RBD) with six treatments and replicated thrice Growth and yield significantly increased by the application of different nutrient sources. Application of Poultry manure @ 6 t ha-1 + Rhizobium @ 20g kg-1 seed + Phosphatica @ 20g kg-1 seed (T6) enhanced both the growth and yield of crop. Maximum number of pods plant-1 (67.73), seeds pod-1 (2.83), grain yield (1513 kg ha-1) and Harvest index(45.62 %) were observed with Poultry manure @ 6 t ha-1 + Rhizobium @ 20g kg-1 seed + Phosphatica @ 20g kg-1 seed (T6).

A field experiment was conducted during the kharif season of 2012 to study the response of black gram [Vigna mungo (L.) Hepper] to different spacing and fertilizer doses under rainfed conditions. Maintaining a wider spacing of 30×10 cm (S 2 ) was found to increase uptake of nutrients P and K by the crop resulting in significantly higher number of leaves, branches and pods per plant respectively, thereby registering the highest grain and stover yields of 730 kg/ha and 1382 kg/ha respectively. Among the fertilizer dose, F 2 (N 10 P 40 K 20 + FYM@ 5 t/ha) was found to increase the availability of NPK by the crop resulting in significantly superior growth attributes viz., plant height, number of leaves and branches/plant and leaf area index (LAI) ultimately recording maximum number of pods/plant, test weight and grain yield of 725 kg/ha. Whereas, the fertilizer dose F 3 (N 20 P 50 K 30 ) was found to record the highest stover yield of 1362 kg/ha.

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