At the Colebrook experimental plots second-cutting hay contained 

 about four times as much ladino clover where the potash was supplied in 

 a split application — 50 pounds K.jO per acre in IVIay plus 50 pounds K2O 

 after the first cutting — rather than as a single application of 100 pounds 

 of K2O in the spring. 



The reason for this lies in the fact that the ladino clover and com- 

 |)anion grasses apparently remove so much of the potash from the soil 

 during the fore part of the growing season that there is an insufficient 

 amount left for good growth of the plants during the later part of the 

 season. 



L. T. Kardos 



Irrigate to Control Pasture Weeds 



Pasture irrigation triples the yield and improves the qualitv of pas- 

 ture forage by reducing the percentage of weeds. Research conducted by 

 the Agronomy Department has shown that on three-year-old stands of 

 ladino-brome and ladino-timothy. irrigation not only increased by three- 

 fold the total forage but also increased the clover and fewer weeds developed. 



Under irrigation the percentage of clover was increased more than 

 80 percent, weeds were decreased by half, while the grass stand was about 

 the same in the irrigated and non-irrigated plots. 



P. T. Blood 



Fit Your Legume to the Soil 



There are approximately 100 different soil types in New Hampshire. 

 Results during the past few years indicate that retention of moisture by 

 these soils may have a very important effect on the yield and persistence 

 of the various perennial legumes. Alfalfa and red clover did better than 

 ladino on a dry soil and during and after prolonged dry spells on moisture 

 retentive soils- Birdsfoot trefoil has persisted well on dry and on moisture 

 retentive soil but has a poorer power of recovery after the first cutting 

 than the other legumes. 



Of the soils included in the experiment, the Paxton showed a poor 

 inherent potassium and boron supplying power as reflected in the appear- 

 ance of severe potash and boron deficiency symptoms on the alfalfa and 

 potash deficiency symptoms on the ladino. Other soils similar to the Pax- 

 ton will require closer attention to potash and boron fertilization for maxi- 

 mum persistence and yield of the perennial legumes. 



L. T. Kardos 



Deeper and Better Root Systems for Alfalfa and Ladino 



During drought periods greater utilization of moisture reserves ni 

 the complete soil profile depends on the depth and extensiveness of the 

 root systems. 



New research has been started to find out to what extent deep tillage 

 with and without deep fertilizer and lime placement can be used to induce 

 deeper and more extensive root systems in soils with compact subsoils. 

 Using a deep tillage chisel the compact subsoil of a Paxton loam was 

 chiselled to depths of 12" and 18" and lime and/or fertilizer applied at 

 those depths. Studies are to be made on the effect of these treatments on 

 the growth of alfalfa and ladino root systems. 



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