Ngulube, S.; Subrahmanyam, P. ; Chiyembekeza, A.J. ; Merwe, P.J.A. van der ; Freeman, H.A.
An experiment was conducted at Chitedze Agricultural Research Station near Lilongwe, Malawi, during the 2000-01 crop season to estimate the production costs and profitability of groundnut at 3 different input levels (low, medium, and high). Production costs were K58221 (US$894) in high input level, K40181 (US$617) in medium input level, and K23300 (US$359) in low input level. Net output in high, medium, and low input levels was 2.96, 1.92, and 1.16 t/ha-1, respectively.
The transpiration response of 14 transgenic groundnut genotypes to water deficit was studied under greenhouse conditions and compared with that of JL 24 (control). Plants were grown under well-watered conditions until 19 days after sowing, after which the plants were saturated with water then subjected to drought stress (absence of irrigation). JL 24 started to show wilting symptoms (loss of turgor) after 21 days of stress, after which severe symptoms were evident in this line. JL 24 reached the stage III (normalized transpiration rate or NTR <0.1) after 27 days.