Biological antagonisms due to phytotoxic root exudates

Population dynamics of soil Acarina in natural and degraded forest ecosystem at Pathalipam, Lakhimpur, Assam

“…Hazra (1991) also reported a decrease in population percentage of mites in deforested site as compared to the reserve forest. Wood (1960) reported that organic matter together with the moisture present in the soil made a condition highly favourable for higher concentration of mites. Morris (1978) also recorded higher concentration of soil fauna in ungrazed site than grazed site.…”

Comparison of the Uptake of P32 and K42 by Intact Alfalfa and Oat Roots

“…In similar tests, however, alfalfa root segments took up (4,5,6,7) and Barber et al (1,2,14) reported that excision of the cotyledons from very young seedlings of certain varieties has significant effects on the number of nodes preceding the first flower.…”

“…Explanations for this growth reduction of the legume include competition for light (5,6), soil moisture (11,15), nutrients (1,4,7,9,10,13), excretion of toxic materials (2,12,14), and effects of the microflora (12).…”

The Effect of Fourteen Root Extracts Upon Germination and Seedling Length of Fifteen Plant Species

“…The effects of plant extracts and exudates on germination and growth have been revie$'ed by a number of authors (2, 3, +,7, 13,23,27,29). Germination inhibitors have been discussed by others (6,12,20).…”