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1982 - 19842
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Subject: Agronomy × End date: 1984 × Start date: 1982 × Type: Thesis × Thesis Type: Ph.D ×
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    Potash nutrition of tapioca (Manihot esculenta Crantz.)
    (Department of Agronomy, College of Agriculture, Vellayani, 1982) Muraleedharan Nair, V; KAU; Sadanandan, N
    An investigation was undertaken at the College of Agriculture, Vellayani and Rice Research Station, Kayamkulam for two years during 1977-79 to study the performance of tapioca (Var. Sree Sahya) under two different agroclimatic conditions. The treatments consisted of three levels of nitrogen (50, 125 and 200 kg N/ha) and three levels of potassium (50,125 and 200 kg K2O/ha) at three times of application. The experiment was laid out in a 3 partially confounded factorial design with two replications.
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    Studies on the interactive effects of water regimes, weed control treatments and nitrogen levels in direct-seeded rice
    (Faculty of the Post-Graduate School, Indian Agricultural Research Institute, New Delhi, 1984) Mohan Kumar, B; KAU; Singh, K N
    Field and green house experiments were conducted in the Division of Agronomy, Indian Agricultural Research Institute, New Delhi, during 1982 and 1983 to study the interaction of nitrogen x weed control x water regimes, on the growth, productivity and nutrient use pattern of direct seeded rice. The treatments in the field trails consisted of 4 levels of nitrogen (0, 50, 100 and 150 kg N ha-1). 3 weed control treatments (weedy check, butachlor, bentazone in 1982 and bentazone plus propanil in 1983) and 2 water regimes (continuously and intermittently flooded). The experiment was laid out in a split plot design, replicated thrice. The variables in the green house experiment were 2 rice cultivars (Pusa 33, drought susceptible and Pusa 312, drought tolerant), 3 nitrogen levels (0,100 and 200 mg N kg soil-1) and 5 soil moisture regimes (submergence to saturation, 0-0.025 MPa, 0-0.05 MPa, 0-0.075 MPa 0-0.10 MPa soil moisture tension).