. Citrus culture in Porto Rico / by Henry C. Henricksen. Citrus fruits Puerto Rico; Fruit-culture Puerto Rico. 24 BULLETIN 3 3, PORTO RICO EXPERIMENT STATION plants grown for wind protection and planting another as soon thereafter as possible. In establishing a grove the first point need- ing consideration is the maintenance of such wind protection as will afford the most favorable conditions for tree growth and eliminate the necessity of spraying. The second point is determining the best method of improving the soil so that it will continue to support growth during the many years the trees ar
. Citrus culture in Porto Rico / by Henry C. Henricksen. Citrus fruits Puerto Rico; Fruit-culture Puerto Rico. 24 BULLETIN 3 3, PORTO RICO EXPERIMENT STATION plants grown for wind protection and planting another as soon thereafter as possible. In establishing a grove the first point need- ing consideration is the maintenance of such wind protection as will afford the most favorable conditions for tree growth and eliminate the necessity of spraying. The second point is determining the best method of improving the soil so that it will continue to support growth during the many years the trees are expected to produce profitable crops. The only treatment required by the tree mounds is that of keeping them free from weeds and sufficiently well supplied with trash to maintain a high degree of soil moisture. The soil will gradually level down and after a few years will leave the trees with the. Figure 15.—Tree which was planted on mound. Crown roots are well exposed and trunk is free from gum disease crown roots entirely exposed. (Figs. 14 and 15.) These roots should be carefully protected from injury. No implement of any kind should be allowed in the proximity of the trees, and weeding should be done by hand. Plows and harrows may be used 4 to 6 feet from the tree trunk. Annual deep plowing is advisable, but inter- mittent plowing is inadvisable. If plowing is deferred for several years the large roots within reach of the plow are likely to be cut, and the tree may thus be seriousty injured. The time and necessity for cultivation and the kind of implement to be used vary with the different local conditions. In one 20-year- old grove where the medium heavy clay soil is kept moist with water from surrounding springs, plowing and cultivation have not been practiced since the trees were young. Para grass {Pcmicum harbi- node) grows luxuriantly in the grove and is cut at intervals. Most of. Please note that these images are extracted from scanned page images that may have be
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